<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <el-alert
        title="注意: 只允许为第三级分类设置相关参数"
        type="warning"
        :closable="false"
        show-icon
      >
      </el-alert>
      <!-- 选择商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <!-- 级联选择器 -->
          <span>选择商品分类:</span>
          <el-cascader
            v-model="selectedCateKeys"
            :options="cateList"
            :props="cateProp"
            @change="handleChange"
          >
          </el-cascader>
        </el-col>
      </el-row>
      <!-- tab页签 -->
      <el-tabs
        v-model="activeName"
        @tab-click="handleClick"
      >
        <el-tab-pane
          label="动态参数"
          name="many"
        >
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="showDialogVisible"
          >添加参数</el-button>
          <!-- 动态参数表格 -->
          <el-table
            :data="manyTableData"
            border
            stripe
          >
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 渲染tag标签 -->
                <el-tag class="elTag" v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="deleteAttr(i, scope.row)">{{ item }}</el-tag>
                <!-- 输入框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引行 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="warning"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="deleteParam(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <el-tab-pane
          label="静态属性"
          name="only"
        >
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="showDialogVisible"
          >添加属性</el-button>
          <!-- 静态参数表格 -->
          <el-table
            :data="onlyTableData"
            border
            stripe
          >
            <!-- 展开行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 渲染tag标签 -->
                <el-tag class="elTag" v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="deleteAttr(i, scope.row)">{{ item }}</el-tag>
                <!-- 输入框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
              </template>
            </el-table-column>
            <!-- 索引行 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="属性名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="warning"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="deleteParam(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加参数/属性对话框 -->
    <el-dialog
      :title="'添加' + titleProp"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="handleDialogClosed"
    >
      <el-form
        :model="addForm"
        :rules="rules"
        ref="addFormRef"
        label-width="100px"
        class="demo-ruleForm"
      >
        <el-form-item
          :label="titleText"
          prop="attr_name"
        >
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="addParam"
        >确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改参数对话框 -->
    <el-dialog
      :title="'编辑' + titleProp"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="rules"
        ref="editFormRef"
        label-width="100px"
        class="demo-ruleForm"
      >
        <el-form-item
          :label="titleText"
          prop="attr_name"
        >
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span
        slot="footer"
        class="dialog-footer"
      >
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button
          type="primary"
          @click="editParam"
        >确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      cateList: [],
      // 级联选择器配置
      cateProp: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectedCateKeys: [],
      activeName: 'many',
      manyTableData: [],
      onlyTableData: [],
      addDialogVisible: false,
      editDialogVisible: false,
      addForm: {
        attr_name: ''
      },
      editForm: {},
      rules: {
        attr_name: [
          { required: true, message: '请输入名称', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getCateList()
  },
  computed: {
    isBtnDisabled() {
      if (this.selectedCateKeys.length !== 3) {
        return true
      } else {
        return false
      }
    },
    // 当前选中三级分类的Id
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2]
      }
      return null
    },
    // 添加参数/属性对话框标题
    titleProp() {
      if (this.activeName === 'many') {
        return '动态参数'
      } else {
        return '静态属性'
      }
    },
    titleText() {
      if (this.activeName === 'many') {
        return '参数名称'
      } else {
        return '属性名称'
      }
    }
  },
  methods: {
    // 获取分类列表
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败')
      }
      this.cateList = res.data
      console.log(this.cateList)
    },
    // 级联选择器改变
    handleChange() {
      this.getParamsCate()
    },
    // 点击tab标签页
    handleClick() {
      // console.log(this.activeName)
      this.getParamsCate()
    },
    // 获取参数列表
    async getParamsCate() {
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return
      }
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: this.activeName } })

      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        // 给每一项添加属性
        item.inputVisible = false
        item.inputValue = ''
      })
      // console.log(res.data)
      // console.log(res)
      // 动态参数数据
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      }
      // 静态属性数据
      if (this.activeName === 'only') {
        this.onlyTableData = res.data
      }
    },
    // 显示添加参数/属性对话框
    showDialogVisible() {
      this.addDialogVisible = true
    },
    // 关闭添加参数对话框
    handleDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 显示编辑参数对话框
    async showEditDialog(attrId) {
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes/${attrId}`)
      if (res.meta.status !== 200) return
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 关闭编辑参数对话框
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 添加属性/参数
    addParam() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(`categories/${this.cateId}/attributes`, { attr_name: this.addForm.attr_name, attr_sel: this.activeName })
        if (res.meta.status !== 201) {
          return this.$message.error('添加属性失败')
        }
        this.$message.success('添加属性成功')
        // this.getCateList()
        this.getParamsCate()
        this.addDialogVisible = false
      })
    },
    // 编辑属性/参数
    editParam() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`, { attr_name: this.editForm.attr_name, attr_sel: this.activeName })
        if (res.meta.status !== 200) {
          return this.$message.error('编辑参数失败')
        }
        this.$message.success('编辑参数成功')
        // this.getCateList()
        this.getParamsCate()
        this.editDialogVisible = false
      })
    },
    // 删除参数
    async deleteParam(attrId) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') return this.$message.info('取消了删除')

      const { data: res } = await this.$http.delete(`categories/${this.cateId}/attributes/${attrId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除参数失败')
      }
      this.$message.success('删除参数成功')
      this.getParamsCate()
    },
    async handleInputConfirm(row) {
      // console.log('ok')
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      row.attr_vals.push(row.inputValue)
      row.inputValue = ''
      row.inputVisible = false
      // 调用接口
      this.saveAttr(row)
    },
    // 保存修改参数
    async saveAttr(row) {
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`, {
        attr_name: row.attr_name,
        attr_sel: row.attr_sel,
        attr_vals: row.attr_vals.join(' ')
      })
      if (res.meta.status !== 200) {
        return this.$message.error('更新失败')
      }
      this.$message.success('更新成功')
    },
    // 删除参数
    deleteAttr(index, row) {
      // alert(123232)
      row.attr_vals.splice(index, 1)
      this.saveAttr(row)
    },
    showInput(row) {
      row.inputVisible = true
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    }
  }
}
</script>
<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.elTag{
  margin-right: 10px;
}
.input-new-tag{
  width: 120px;
}
</style>
